Curve - Source Level Profile

Hi,

I'd like to know what is the purpose of having multiple Source Level Profiles associated to one Final Level Profile.

Let's say I have source level forecasting set up like the following:

Final Level 1: item x store x day

Source Level 2: item x district x day

Source Level 3: item x region x day

Source Level 4: item x area x day

Can I create a profile set up in Curve configuration like the following?

Final Profile Level 1: profile intx: item x store x day / aggregation intx: item x district x day

Source Profile Level 2: profile intx: item x store x day / aggregation intx: item x district x day